Set up Python SDK | LaunchDarkly

Install and initialize the LaunchDarkly Python SDK to start evaluating feature flags in your application.

Install the package

pip

pip3 install launchdarkly-server-sdk

Initialize the SDK

Python SDK initialization

import os
import ldclient
from ldclient import Context
from ldclient.config import Config
if __name__ == '__main__':
    # This is your LaunchDarkly SDK key.
    # Never hardcode your SDK key in production.
    ldclient.set_config(Config('YOUR_SDK_KEY'))
    if not ldclient.get().is_initialized():
        print('SDK failed to initialize')
        exit()
    # For onboarding purposes only we flush events as soon as
    # possible so we quickly detect your connection.
    # You don't have to do this in practice because events are automatically flushed.
    ldclient.get().flush()
    print('SDK successfully initialized')

Finding your SDK credentials

You can find your server-side SDK keys, mobile keys, and client-side ID on the SDK keys page under Settings.

To learn more, read Initialize the client in the Python SDK reference guide.